he·ma·to·gen·e·sis (h  m -t-j n  -ss, h-m t-) or he·mo·gen·e·sis (hm-)n. See hematopoiesis. he ma·to·genic, hema·to·ge·netic adj. |
hematogenesis
[-jen′əsis]
Etymology: Gk, haima, blood, genein, to produce
the formation of blood cells or an increase in the production of blood elements. Also called hemapoiesis.
hematopoiesis [he″mah-to-poi-e´sis]
the formation and development of blood cells. In the embryo and fetus it takes place in a variety of sites including the liver, spleen, thymus, lymph nodes, and bone marrow; from birth throughout the rest of life it is mainly in the bone marrow with a small amount occurring in lymph nodes. Called also hematogenesis, hemogenesis, and hemopoiesis.
extramedullary hematopoiesis the formation and development of blood cells outside the bone marrow, as in the spleen, liver, and lymph nodes.
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